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NEW QUESTION 40
Given two expressions var1 and var2. What are two valid ways to return the logical AND
of the two expressions and ensure it is data type Boolean ?
Choose 2 answers:
- A. Boolean(var1) && Boolean(var2)
- B. var1 && var2
- C. Boolean(var1 && var2)
- D. var1.toBoolean() && var2toBoolean()
Answer: A,C
NEW QUESTION 41
Refer to the code below:
Function changeValue(obj) {
Obj.value = obj.value/2;
}
Const objA = (value: 10);
Const objB = objA;
changeValue(objB);
Const result = objA.value;
What is the value of result after the code executes?
- A. Nan
- B. 0
- C. 1
- D. Undefined
Answer: C
NEW QUESTION 42
Refer to code below:
Let a ='a';
Let b;
// b = a;
console.log(b);
What is displayed when the code executes?
- A. Null
- B. Undefined
- C. A
- D. ReferenceError: b is not defined
Answer: B
NEW QUESTION 43
Refer to the following code block:
class Animal{
constructor(name){
this.name = name;
}
makeSound(){
console.log(`${this.name} is making a sound.`)
}
}
class Dog extends Animal{
constructor(name){
super(name)
this.name = name;
}
makeSound(){
console.log(`${this.name} is barking.`)
}
}
let myDog = new Dog('Puppy');
myDog.makeSound();
What is the console output?
- A. Puppy is barking
Answer: A
NEW QUESTION 44
What are two unique feature of function defined with a fat arror as compared to normal functional definition?
Choose 2 answers
- A. If the function has a single expression in the function body, the expression will be evaluated and implicitly returned.
- B. The function generation its own this making it useful for separating the function's scope its enclosing scope
- C. The function uses the this from the enclosing scope.
- D. The function receives an argument that is always in scope, called parent this, which is the enclosing lexical scope
Answer: A
NEW QUESTION 45
Given a value, which three options can a developer use to detect of the value is NaN?
Choose 3 answers
- A. Object , is ( value, NaN)
- B. Number , isNaN(value)
- C. Value == NaN
- D. Value == Number, NaN
- E. Value I== value
Answer: A,B,C
NEW QUESTION 46
Refer to the code below:
01 const exec = (item, delay) =>{
02 new Promise(resolve => setTimeout( () => resolve(item), delay)),
03 async function runParallel() {
04 Const (result1, result2, result3) = await Promise.all{
05 [exec ('x', '100') , exec('y', 500), exec('z', '100')]
06 );
07 return `parallel is done: $(result1) $(result2)$(result3)`;
08 }
}
}
Which two statements correctly execute the runParallel () function?
Choose 2 answers
- A. runParallel ( ). done(function(data){
return data;
}); - B. runParallel () .then(data);
- C. Async runParallel () .then(data);
- D. runParallel () .then(function(data)
return da
Answer: A,D
NEW QUESTION 47
Refer to the code below:
What is the output after the ode executes successfully?
- A. Success
Start
End - B. Start
Success
End - C. Start
End
Success - D. End
Start
Success
Answer: B
NEW QUESTION 48
A developer wrote the following code:
01 let X = object.value;
02
03 try {
04 handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
The developer has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?
- A. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 }
08 getNextValue(); - B. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 } then {
08 getNextValue();
09 } - C. 03 try {
04 handleObjectValue(x)
05 ........................ - D. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 } finally {
08 getNextValue();
10 }
Answer: C
NEW QUESTION 49
Cloud Kicks has a class to represent item for sale in an online store, as shown below:
A new business requirement comes in that request a clothingitem class, that should have all of the properties and methods of the item class, but will also have properties that are specific top clothes.
Which line of code properly declares the clothingitem class such that it inherits from item?
- A. Class clothingitem extends item (
- B. Class clothingitem implements item (
- C. Class Clothingitem (
- D. Class clothing item super item (
Answer: A
NEW QUESTION 50
Refer to the code below:
Const myFunction = arr => {
Return arr.reduce((result, current) =>{
Return result = current;
}, 10};
}
What is the output of this function when called with an empty array ?
- A. Throws an error
- B. Returns NaN
- C. Returns 0
- D. Returns 10
Answer: B
NEW QUESTION 51
Refer to the code below:
Which value can a developer expect when referencing country,capital,cityString?
- A. An error
- B. undefined
- C. 'NaN'
- D. 'London'
Answer: C
NEW QUESTION 52
Considering type coercion, What does the following expression evaluate to?
True + ) + '100 ' + null
- A. 0
- B. '4100null'
- C. '3100null'
- D. 1
Answer: B
NEW QUESTION 53
In which situation should a developer include a try... catch block around their function call?
- A. The function has an error that should not be silenced.
- B. The function contains scheduled code.
- C. The function results in an out of memory issue.
- D. The function might raise a runtime error that needs to be handled.
Answer: D
NEW QUESTION 54
Which three options show valid methods for creating a fat arrow function? Choose 3 answers
- A. (x, y, z) => (console.log ('executed') ;)
- B. ( ) => { console.log (' executed') ; )
- C. { } => { console.log (executed') ; )
- D. X => {console.log {'executed'} ; }
- E. X, y, z => ( console.log ('executed') ; )
Answer: A,B,D
NEW QUESTION 55
Which option is true about the strict mode in imported modules?
- A. You can only reference notStrict () functions from the imported module.
- B. Imported modules are in strict model whether you declare them as such or not.
- C. Add the statement use non-strict; before any other statement in the module to enable not strict mode.
- D. Add the statement use strict = false, before any other statements In the module to enable not-strict mode.
Answer: A
NEW QUESTION 56
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